/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package com.architexa.org.eclipse.gef.ui.actions;

import com.architexa.org.eclipse.gef.commands.Command;
import com.architexa.org.eclipse.gef.internal.GEFMessages;

import java.text.MessageFormat;

import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;


/**
 * An action to redo the last command.
 */
public class RedoAction
	extends StackAction
{

/**
 * Creates a <code>RedoAction</code> and associates it with the given workbech part.
 * @param part The workbench part this action is associated with.
 */
public RedoAction(IWorkbenchPart part) {
	super(part);
}

/**
 * Creates a <code>RedoAction</code> and associates it with the given editor.
 * @param editor The editor this action is associated with.
 */
public RedoAction(IEditorPart editor) {
	super(editor);
}

/**
 * @see com.architexa.org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
 */
protected boolean calculateEnabled() {
	return getCommandStack().canRedo();
}

/**
 * Initializes this actions text and images.
 */
protected void init() {
	super.init();
	setToolTipText(MessageFormat.format(
			GEFMessages.RedoAction_Tooltip,	
			new Object[] {""}).trim());  //$NON-NLS-1$
	setText(MessageFormat.format(
			GEFMessages.RedoAction_Label, 
			new Object[] {""}).trim()  //$NON-NLS-1$
			);
	setId(ActionFactory.REDO.getId());
	
	ISharedImages sharedImages = PlatformUI.getWorkbench().getSharedImages();
	setImageDescriptor(sharedImages.getImageDescriptor(ISharedImages.IMG_TOOL_REDO));
	setDisabledImageDescriptor(sharedImages.getImageDescriptor(
			ISharedImages.IMG_TOOL_REDO_DISABLED));
}

/**
 * Refreshes this action's text to use the last undone command's label.
 */
protected void refresh() {
	Command redoCmd = getCommandStack().getRedoCommand();
	setToolTipText(MessageFormat.format(
			GEFMessages.RedoAction_Tooltip,
			new Object [] {getLabelForCommand(redoCmd)}).trim());
	setText(MessageFormat.format(
			GEFMessages.RedoAction_Label,
			new Object[]{getLabelForCommand(redoCmd)}).trim());
	super.refresh();
}

/**
 * Redoes the last command.
 */
public void run() {
	getCommandStack().redo();
}

}
